Peniocereus greggii, the queen of the night cactus
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Botanical Plates from The Report on the United States and Mexican Boundary Survey, 1859
Illustrated by Paulus Roetter, Steel engravings by Philibert and Eugène Picart of Paris, France
Vol. II “Botany of the Boundary. Cactaceae" by George Engelmann, M.D.
All images courtesy of Cactuspro www.cactuspro.com/biblio
Works by Lucretia Breazeale Hamilton (1908–1986) from the illustrations collection at the University of Arizona Herbarium
Works by Ella Howard Estill (1860–1941) from the illustrations collection at the University of Arizona Herbarium